Clam AntiVirus is an anti-virus toolkit designed especially for email scanning on mail gateways. It provides a number of utilities, including a flexible and scalable multi-threaded daemon, a commandline scanner, and a tool for automatic database updates. The core of the package is an anti-virus engine available as a shared library.
getmail is intended as a simple, secure, and reliable replacement for fetchmail. It retrieves email (either all messages, or only unread messages) from one or more POP3, SPDS, or IMAP4 servers (with or without SSL) for one or more email accounts, and reliably delivers into qmail-style Maildirs, mboxrd files, or through external MDAs (command deliveries) specified on a per-account basis. getmail also has excellent support for domain (multidrop) mailboxes, including delivering messages to different users or destinations based on the envelope recipient address.
Parse Direct User Access Terminal mitigates information overload from aviation weather brief downloads. The USA Federal Aviation Administration (FAA) Direct User Access Terminal (DUAT) standard, outlook, and abbreviated weather brief are broken into a hierarchy of files. Each file contains one METAR/NOTAM/PIREP/TAF/etc. Options allow input of HTML source or text, output of HTML or text, and a flat directory or multi-level directory. As separate files, NOTAMS/etc. scripts can quickly identify changed information, or prioritize for relevance. Parsing is lossless and the complete original text can be reconstructed using cpp(1).
mailagent uses lex-like rules to match messages and run rich set of commands. Mail can be stored in mailboxes, forwarded, piped through external applications, posted to newsgroups, checked for duplicates, annotated, or deleted. Headers can be pruned and digests burst. Additional commands can be written in Perl.
yaspi (Yosi's Anti-Spam POP3 fIlter bot) is a POP3 mail-scanner specifically made to combat mail bombings caused by viruses (i.e. Swen). It connects to the POP3 server, inspects the messages, and deletes the infected ones without ever downloading them. Its most interesting feature is that it can automatically send abuse reports to the ISPs from which the infected mails originated.
contraccions validates word contractions in the Catalan language. Word contractions in Catalan spelling are very complex and the function enclosed in this package allows a spellchecker to warn about wrong expressions and to suggest something to correct them. It returns a code to indicate the type of the error and the location of the error in the expression, and allows a spellchecker to perform incremental validation.
DynaStop is a utility to examine IPv4 based addresses for Exim and procmail for the purpose of filtering based upon patterns defined by the administrator. This can be a pivotal factor in email filtering and server load management, since dynamic IP addresses are typically used for dial-up, DHCP, and DSL accounts. All of which have a designated mail exchange server through which all outbound mail flows as defined with many, if not most, large Internet service providers.